Kernel-4.18.0-80.el8_atmel-tcb

• Device tree bindings for Atmel Timer Counter Blocks

• compatible: Should be “atmel,-tcb”, “simple-mfd”, “syscon”.
  can be “at91rm9200” or “at91sam9x5”
• reg: Should contain registers location and length
• #address-cells: has to be 1
• #size-cells: has to be 0
• interrupts: Should contain all interrupts for the TC block
  Note that you can specify several interrupt cells if the TC
  block has one interrupt per channel.
• clock-names: tuple listing input clock names.
  Required elements: “t0_clk”, “slow_clk”
  Optional elements: “t1_clk”, “t2_clk”
• clocks: phandles to input clocks.

The TCB can expose multiple subdevices:

• a timer
  • compatible: Should be “atmel,tcb-timer”
  • reg: Should contain the TCB channels to be used. If the
    counter width is 16 bits (at91rm9200-tcb), two consecutive
    channels are needed. Else, only one channel will be used.

Examples:

One interrupt per TC block:
tcb0: timer@fff7c000 {
compatible = “atmel,at91rm9200-tcb”, “simple-mfd”, “syscon”;
#address-cells = <1>;
#size-cells = <0>;
reg = <0xfff7c000 0x100>;
interrupts = <18 4>;
clocks = <&tcb0_clk>, <&clk32k>;
clock-names = “t0_clk”, “slow_clk”;

    timer@0 {
        compatible = "atmel,tcb-timer";
        reg = <0>, <1>;
    };

    timer@2 {
        compatible = "atmel,tcb-timer";
        reg = <2>;
    };
};

One interrupt per TC channel in a TC block:
tcb1: timer@fffdc000 {
compatible = “atmel,at91rm9200-tcb”, “simple-mfd”, “syscon”;
#address-cells = <1>;
#size-cells = <0>;
reg = <0xfffdc000 0x100>;
interrupts = <26 4>, <27 4>, <28 4>;
clocks = <&tcb1_clk>, <&clk32k>;
clock-names = “t0_clk”, “slow_clk”;
};